mi mi
/
wave_player_pwm
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Information
Under construction
Description¶
This is a simple wave player application using PWM port.
Spec.¶
- Input data: WAVE file converted by foobar2000.
- Data length: 16bit, 8bit.
- fs : 32kHz,44.1kHz,48kHz.
- Channel: Stereo, mono
- Output data: PWM 11bit resolutuon. fs and Channel are the same as input data.
Board¶
NUCLEO-F411RE
Using Library¶
- SDFileSystem http://developer.mbed.org/users/neilt6/code/SDFileSystem/ Modified this library a little.
- FastPWM http://developer.mbed.org/users/Sissors/code/FastPWM/
- millis http://developer.mbed.org/users/lisper/code/millis/
Terminal base CUI¶
UART Terminal (e.g. Tera Term) base operation,
Tera Tem settings¶
- Serial om port: Baudrate 115200bps.
- Main Menu - [Setup] - [Terminal] dialog:
New-line settings.
Operation¶
| Key | Operation | on Play | on Stop | on Pause |
|---|---|---|---|---|
| 0 - 9 | Select a music or Folder. | - | o | - |
| b, ESC | Back to root folder. | - | o | - |
| b, ESC | Stop playing. | o | - | o |
| l(el), Enter | List files. | - | o | o |
| p | Pause or Play. | Pause | Play | Play |
| q | Quit player mode. | o | o | o |
| r | Repeat current song. | o | o | o |
| s | Stop playing. | o | - | o |
| ., > , Space | Next song. | o | o | o |
| < | Previous song. | o | o | o |
| [ | Back to top of music. | o | o | o |
| c | Repeat all music in folder | o | o | o |
| 1 - 4 | Play slowly 4 step. | o | - | o |
| 5 - 7 | Play rappidly 3 step. | o | - | o |
| h | Help menu. | - | o | o |
Playing music¶
Now You are hearing the sound from PWM port of mbed board.
Music01:
Music02:
Music03: